Lumen : the art and science of light, 800-1600 / edited by Kristen Collins and Nancy K. Turner ; with contemporary contributions by Glenn Phillips ; with essays by Taha Yasin Arslan, Adam S. Cohen, Seb Falk, Margaret Gaida, Elina Gertsman, Cynthia Hahn, Liz James, Christopher R. Lakey, Bissera V. Pentcheva, G. Gabrielle Starr, Abbey Stockstill